Steam-generator



(No Model.)

E.- H. THOMPSON.

STEAM GENERATOR.

No. 384,941. Patented June 19, 1888.

iii/129554 N. PETERS. Fholol lhugnphar. Walhinglon. D C.

UNITED STATES PATENT OFFICE.

ELIAS H. THOMPSON, OF NEWARK, ASSIGNOR OF ONE-HALF TO E. LOLAEK AND J.B. WELOH, OF TULARE, AND CORNELIUS A. SHERMAN, OF LOS' GATOS, OALIFORNIA.

STEAM-G EN ERATO R.

EPECIFICATION forming part of Letters Patent No. 384.941, dated June 19,1888.

(No model.)

To all whom it may concern.-

Be it known that I, ELIAS H. THOMPSON, a citizen of the United States,residing at Newark, in the county of Alameda and State of California,have invented certain new and useful Improvements in Steam-Generators;and I do hereby declare that the following is a full, clear, and exactdescription of mysaid invention, reference being had to the drawingsthat to form a part of this specification.

My invention relates to improvements in steam-generators or boilers inwhich liquid fuel-such as petroleum or gasis burned; and it consists incertain improved construction of boiler or generator, consisting of anannular water-chamber with a tubular fireflue extending through it fromend to end,and Water-tubes arranged in and around the fireflue, ashereinafter fully described; also, in the combination,with eachgenerator, of an inclosing-case with spaces and partitions for carryingand directing the heated air and gases from the end of the fire-flue ina circuitous manner around the outside of the generator,

as hereinafter described.

The nature of these improvements and the manner in which I construct andcarry out the same to produce a steam-boiler for burning liquid fuel orgas are explained in the following description, the accompanyingdrawings being referred to by figures and letters.

Figure l is a side elevation partly in l0ngitudinal section. Fig. 2. isa crosssection at a: 00, Fig. "1. Fig. 3 is a cross-section at y y,

Fig. 1. Fig. 4 is a cross-section through a boiler constructed accordingto my invention, with three fire-fines.

I form the body A of my improved boiler with an inner shell, A, and anouter shell,

0 A, united at both ends by a double head, B B ywith a tubular openingand passage, the part whereof which lies between theshells- B and Bbeing inclosed by a thimble, B, there being also a pipe or connection,B, con- 4 5 necting the casting I with the thimble B. The outer shell issecured to the head B and the inner shell to the head B. Thisconstruction produces an annular water-chamber, G, surrounding a tubularfire-flue, D, which extends through both ends of the boiler. \Vithinthis fire'space are water-tubes E E, arranged in a circle for the fulllengtl1,with the ends of I the tubes setting through the heads orflanges B, and with fire-spaces between the tubes for circulation ofheat and flames around them. 5 5 I At one end of the flue D, directly infront of the opening in one head, is placed a petrol leum-burner ofsuitable capacity and power to inject and throw a flame through thefire-flue from end to end of the boiler. petroleum-burner is used forthe purpose with connection of a petroleum-tank and a steamjet suppliedfrom the boiler. Such conuec tion is clearly shown in Fig. 1 of the drawI I ings.

A steanrdrum, G, is placed on the top of the boiler and connected in theusual manner with the steam and water space, the necessary f f jsteam-gages and safetyvalve being provided on this part. iron casting,I, that surrounds them on all sides, but leaves space between its insidewalls and the outer surfaces of the boiler and drum. This space isdivided into passages K K by longitudinal partitions L L, thatterminateat alternate ends just short of the head or end of the casing, asshownat W, Fig. 1, so that one passage communicates with the other, andthe whole space forms a circuitous passage from I the discharge end ofthe fire-space up to the 80,31

outlet J at thetop of the casing. The object of this casing is toutilize what heat and gases are discharged at the rear end of the boilerfirespace by carrying them around the outside of the generator, back andforth, before passing 5 into the chimney. It will be obvious that thesepassages can be formed also in a brick-work setting, where suohcasingmay be preferred, instead of the cast-iron case I.

In Fig. 4 I have illustrated as a modifica- 9o Any suitable 6o I inclosethese parts in a cast- 70f? the spaces at the ends arranged over thefire, and I do not claim such, as my invention possesses the advantageof utilizing the entire amount of heat generated, and has no wastespaces and no unheated parts in which it is difficult to heat the water.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is

1. In a steam-generator, theeombination of an outer shell, A, and aninner shell, A the heads B and 13, extending inward past the shell A allaround at each end thereof, and having the thimbles B, connecting thesaid heads, substantially as described, and the water-tubes E, placed ina circle all around the fire-flue and communicating at each end with thewaterchamber between the shells A A, as and for the purpose set forth.

2. In a steam-generator, the combination, with a cylindrical fire-fluecontracted all around at both ends, a water-chamber surrounding saidfire-flue on the sides and over a portion of the ends, and thimblesconnecting the walls of the ends, of a series of water- ELIAS H.THOMPSON. [n s.]

\Vitnesses:

0. WV. M. SMITH, CHAS. E. KELLY.

